Question

use the cost function to
find the value of x at which the average cost is a minimum. For that value of x, show that the marginal cost and average cost are equal.

Answer 1

how do you do that!

Answer 2

C(x) = 2x^2+5x+18

Answer 3

if you are looking for the minimum value of \(C(x) = 2x^2+5x+18\) you need the vertex, which is at \(-\frac{b}{2a}=-\frac{5}{4}\) in your case

Answer 4

i have no idea what marginal cost and average cost is, however